I literally cracked up when the dog walked out the door, pushed over the mailbox, the returned inside and closed the door! It was even funnier that it happened right after the dog had been watching his owner come home (the night before!) and straighten the mailbox! This made me think that all that time this explained daily ritual. lol

For the record: that dog was stinkin' adorable.

BTW, why the SPOILER protection? It's almost the only thing that happens in this movie! :)